Pickering sprays /

Cook, F. C.

doi:10.5962/bhl.title.108351

Cited by 1 publication

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“…for periods of 1 hour, 1 day, and 3 days. The mixtures were filtered immediately and the filtrates were tested for copper by the colorimetric test with potassium ferrocyanid (12) and for lead by the lead sulphid color test as used by W. D. Lynch, of the insecticide and fungicide laboratory.…”

Section: Arsenates and Bordeaux Mixturementioning

confidence: 99%

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Chemical, physical, and insecticidal properties of arsenicals

Cook¹,

McIndoo²

1923

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A study of the chemical, physical, and insecticidal properties of arsenicals on the market was undertaken in order to gain a better understanding of them, to be able, if possible, to improve them, and to produce new arsenicals for insecticidal purposes. The results of this investigation, which was conducted by the Bureau of Chemistry and the Bureau of Entomology of the United-States Department of Agriculture, are here reported. ARSENICALS STUDIED.Paris green and lead arsenate, which have been standardized and found reliable for many years, have constituted the principal insecticides used against external chewing insects. However, during the past few years, the use of calcium arsenate has steadily increased, owing in part to the discovery that it is effective in combating the boll weevil. The manufacture of calcium arsenate, although well beyond the experimental stage in most factories, probably will not be completely standardized for several j^ears. Because of the importance and recent large-scale production of calcium arsenate, many of the results in this bulletin deal with comparisons of calcium arsenate and acid lead arsenate.

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Section: Arsenates and Bordeaux Mixturementioning

confidence: 99%

“…It was then sprayed, and, when dry, a bottle with contents was placed in a large battery j ar, 8 inches in diameter by 12 The temporary preservative in the control food seems to have increased the mortality about 4 per cent.…”

Section: Application Of Spray Mixturesmentioning

confidence: 99%

Chemical, physical, and insecticidal properties of arsenicals

Cook¹,

McIndoo²

1923

Self Cite

View full text Add to dashboard Cite

show abstract

Pickering sprays /

Cited by 1 publication

References 3 publications

Chemical, physical, and insecticidal properties of arsenicals

Chemical, physical, and insecticidal properties of arsenicals

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